Stay-bolt structure



R. s.- MENNIE. I STAY BOLT STRUCTURE.

Patented Aug. 1, 1922.

[NVE/VTUR A /I immeys ROBERT S. 1VIENNIE, .OF CHICAGO, ILLINOIS,LASSTGNOR TO FLANNEBY BOLT COMPANY, OF PITTSBURGH, PENNSYLVANIA.

STAY-BOLT STRUCTURE.

specification of Letters Patent.

Patented Aug. 1,

Original application filed February 5, 1916, Serial No. 76,333. Dividedand this application filed August T0 aZZ whom it may concern:

Be it known that 1, ROBERT S. Mia-Janina citizen of Canada, and aresident of Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Stay-Bolt Structures;and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

This invention relates to improvements in staybolt structures forboilers,-this application being a division of application for patentfiled by me on the 5th day of February 1916 and designated by Serial No.76,333.

The object of my present invention is to provide a bearing for the headof a staybolt which shall be built up on the outer face of the boilersheet around the bolt opening and constitute, in effect, an integralpart of the structure of the seat; which shall be particularly usefulfor the mounting of the head of a radial staybolt on an inclined or roofsheet, and to effectually enclose the head of the staybolt and itsbearing on the built-up boss.

With this and other objects in view, the invention consists in certainnovel features of construction and combinations of parts as hereinafterset forth and pointed out in the claims.

The accompanying drawing is a sectional View showing an embodiment of myinvention. a

1 represents the inclined roof or cross sheet of a boiler having astaybolt opening 2.

Around the opening 2, a boss 3 is built up by welding with a weldingalloy, so that the component parts of said alloy shall be fused andwelded together and so that the boss as a whole shall be welded to theouter face of the boiler sheet and become an integral part of thelatter. In the building up of the weld forming the boss on the inclinedboiler sheet, said boss is so shaped that its outer end shall be in anapproximately horizontal plane substantially at right angles to thelongitudinal axis of a stay bolt 4, the rounded head 5 of which isseated on said boss. To provide a suitable mounting for the bolt head,the built-up boss/ is formed with a depression forming a curved orrounded seat 6.

Serial No. 320,648.

A cap or closure '7 which, in the embodiment of the invention shown inthe drawing, is hemispherical and is disposed upon the outer end of thebuilt-up boss 3 in a manner to enclose the bolt head and its seat. Thedimensions of the cap or closure is such as to provide a clearance space8 and the peripheral portion of said cap or closure is fixedly united tothe outer end of the builtup boss 8 by a weld 9.

F or testing purposes, the bolt,may be provided with a tell-tale hole 10which may extend from the inner end of the bolt and terminate within thehead thereof. The head of the bolt may be provided with a socket 11 forthe accommodation of a tool and a plug 12 welded in the outer end of thetell-tale hole serves to effect the termination of the outer end of saidhole within the head of the bolt.

The interior of the bearing boss is so formed as to provide acontinuation of the opening 2, as at 14-, and the bolt opening is ofsuch size that adequate play for the bolt will be insured.

Having fully described my invention, what I claim as new and desire tosecure by Letters-Patent, is

1. In a staybolt structure, the combination with a boiler sheet having abolt opening, of a mass of welding alloy having welded union with theouter face of the boiler sheet and having a shape forming an annularboss around the opening in the boiler sheet, a closure engaging saidboss of welding alloy, and a staybolt having a. head enclosed. by saidboss and closure.

2. In a staybolt structure, the combination with a boiler sheet having abolt opening, of a mass of welding alloy having welded union with theouter face of the boiler sheet and having a shape forming an annularboss around the opening in the boiler sheet and having a part forming aseat for the head of a staybolt, a staybolt having a head seated on saidboss, and a closure having welded union with said boss of welding alloy.

3. In a staybolt structure, the combination with an inclined boilersheet having an opening, and a staybolt passing through said opening, ofa boss on said inclined sheet around the opening therein, the outer endof said boss being approximately in a hori zontal plane substantially atright angles to the head of the staybolt, the outer end of the boss inwhich the seat is formed being in an approximately horizontal plane, anda closure over the bolt head and Welded at its edge to the end of thebuilt-up Weld forming the boss.

In testimony whereof, I have signed this specification in the presenceof two subseribing Witnesses.

ROBERT S. MENN-IE'. Vitnesses:

EDWARD M. FLINT, HARRY F. NEBENGOW.

